以下是 FetchAddressIntentService 实施与 IntentService (kotlin中)。
class FetchAddressIntentService //Constructor of this service
: IntentService(INTENTTAG) {
//Receiver where results are forwarded from this service
protected var resultReceiver: ResultReceiver? = null
private val TAG by lazy { this::class.java.simpleName }
//Intent Service handler
override fun onHandleIntent(intent: Intent?) { //Errormessages
var errorMessage = ""
if (intent != null) {
resultReceiver =
intent.getParcelableExtra(RECEIVER)
}
//Checks if receiver was properly registered
if (resultReceiver == null) {
Log.wtf(
TAG,
"No reciever received. There is nowhere to send the results !!"
)
return
}
//Get the location passed to this service through an extra.
var location: Location? = null
if (intent != null) {
location =
intent.getParcelableExtra(LOCATION_DATA_EXTRA)
}
//Make sure the location is really sent
if (location == null) {
errorMessage = getString(R.string.gis_error_no_location_data_provided)
Log.wtf(TAG, errorMessage)
deliverResultToReceiver(FAILURE_RESULT, errorMessage)
return
}
//Setting locale
val geocoder = Geocoder(this, Locale.ROOT)
//Address found
var addresses: List<Address>? = null
try {
addresses = geocoder.getFromLocation(location.latitude, location.longitude, 1)
Log.i(TAG,"rec: address = ${addresses[0]}")
} catch (ioException: IOException) { //Catches network or i/o problems
errorMessage = getString(R.string.gis_error_service_not_available)
Log.e(TAG, errorMessage, ioException)
} catch (illegalArgumentException: IllegalArgumentException) { //Error in latitude or longitude data
errorMessage = getString(R.string.gis_error_invalid_lat_long_used)
Log.e(
TAG,
errorMessage + ". Latitude = " + location.latitude +
", Longitude = " + location.longitude,
illegalArgumentException
)
}
//Handles cases where no addresses where found
if (addresses == null || addresses.isEmpty()) {
if (errorMessage.isEmpty()) {
errorMessage = getString(R.string.gis_error_no_address_found)
Log.e(TAG, errorMessage)
}
deliverResultToReceiver(FAILURE_RESULT, errorMessage)
} else {
val address = addresses[0]
//deliverAddressToReceiver(SUCCESS_RESULT, address)
deliverAddressToReceiver2(SUCCESS_ADDRESS,address)
}
}
private fun deliverAddressToReceiver2(
resultCode: Int,
address: Address
){
val bundle = Bundle()
bundle.putParcelable("address",address)
resultReceiver?.send(resultCode,bundle)
}
private fun deliverResultToReceiver(resultCode: Int, message: String) {
val bundle = Bundle()
bundle.putString(RESULT_DATA_KEY, message)
resultReceiver!!.send(resultCode, bundle)
}
companion object {
private const val INTENTTAG = "FetchAddressIS"
}
}
有谁能给我一个建议，如何将 IntentService 与 JobIntentService 在好的方式？
IntentService 在Android-R Android-11中被废弃了。
我试着关注了一些相关的帖子，但是没有人指导正确的路径，如何将IntentService调用的可用性改为JobIntentService调用的方式，这个AddressFetchIntentService使用的是 IntentService.
RG
class FetchAddressIntentService : JobIntentService() {
// This method is called when service starts instead of onHandleIntent
override fun onHandleWork(intent: Intent) {
onHandleIntent(intent)
}
// remove override and make onHandleIntent private.
private fun onHandleIntent(intent: Intent?) {}
// convenient method for starting the service.
companion object {
fun enqueueWork(context: Context, intent: Intent) {
enqueueWork(context, FetchAddressIntentService::class.java, 1, intent)
}
}
}
你可以以如下方式启动该服务
val intent = Intent(this, FetchAddressIntentService::class.java)
FetchAddressIntentService.enqueueWork(this, intent)
重要的是，你需要添加权限来表现。
你需要添加权限来表现。
<uses-permission android:name="android.permission.WAKE_LOCK" /> /需要为pre-oreo设备
还
<service
android:name=".FetchAddressIntentService"
android:permission="android.permission.BIND_JOB_SERVICE" // needed for oreo and above
android:exported="true"/>
阅读更多 此处
ADDED 2020.06.02 19:20 GMT By Roar Grønmo
我把我的代码改为：
class FetchAddressJobIntentService:JobIntentService()
{
private val TAG by lazy { this::class.java.simpleName }
protected var resultReceiver: ResultReceiver? = null
/*
override fun onHandleWork(intent: Intent) {
onHandleIntent(intent)
}*/
override fun onHandleWork(intent: Intent) { //Errormessages
var errorMessage = ""
resultReceiver = intent.getParcelableExtra(RECEIVER)
//Checks if receiver was properly registered
if (resultReceiver == null) {
Log.wtf(
TAG,
"No reciever received. There is nowhere to send the results !!"
)
return
}
//Get the location passed to this service through an extra.
var location: Location? = null
location = intent.getParcelableExtra(LOCATION_DATA_EXTRA)
//Make sure the location is really sent
if (location == null) {
errorMessage = getString(R.string.gis_error_no_location_data_provided)
Log.wtf(TAG, errorMessage)
deliverResultToReceiver(FAILURE_RESULT, errorMessage)
return
}
//Setting locale
val geocoder = Geocoder(this, Locale.ROOT)
//Address found
var addresses: List<Address>? = null
try {
addresses = geocoder.getFromLocation(location.latitude, location.longitude, 1)
Log.i(TAG,"rec: address = ${addresses[0]}")
} catch (ioException: IOException) { //Catches network or i/o problems
errorMessage = getString(R.string.gis_error_service_not_available)
Log.e(TAG, errorMessage, ioException)
} catch (illegalArgumentException: IllegalArgumentException) { //Error in latitude or longitude data
errorMessage = getString(R.string.gis_error_invalid_lat_long_used)
Log.e(
TAG,
errorMessage + ". Latitude = " + location.latitude +
", Longitude = " + location.longitude,
illegalArgumentException
)
}
//Handles cases where no addresses where found
if (addresses == null || addresses.isEmpty()) {
if (errorMessage.isEmpty()) {
errorMessage = getString(R.string.gis_error_no_address_found)
Log.e(TAG, errorMessage)
}
deliverResultToReceiver(FAILURE_RESULT, errorMessage)
} else {
val address = addresses[0]
//deliverAddressToReceiver(SUCCESS_RESULT, address)
deliverAddressToReceiver2(SUCCESS_ADDRESS,address)
}
}
private fun deliverAddressToReceiver2(
resultCode: Int,
address: Address
){
val bundle = Bundle()
bundle.putParcelable("address",address)
resultReceiver?.send(resultCode,bundle)
}
private fun deliverResultToReceiver(resultCode: Int, message: String) {
val bundle = Bundle()
bundle.putString(RESULT_DATA_KEY, message)
resultReceiver!!.send(resultCode, bundle)
}
companion object{
fun enqueueWork(context: Context, intent: Intent){
enqueueWork(context,FetchAddressJobIntentService::class.java, 1, intent)
}
}
}